The process of modifying bentonite with saccharide molecular compounds suitable for use as water-retaining agents in cement-based materials.

Abstract

------25 / 02 / 2568------(OCR) OCR 10KL This invention aims to develop a bentonite modification process to obtain bentonite suitable for use as an admixture with improved water-retaining capacity in cement-based materials. The bentonite modification process described in this invention involves preparing bentonite as a raw material, a bentonite modifier selected from saccharide molecular compounds, and water. The pH is adjusted to be between 11.0 and 14.0, and the dry weight ratio of bentonite to modifier is between 1:0.4 and 1:2.0, to obtain bentonite with properties suitable for use as an admixture in cement-based materials.

Claims

------25 / 02 / 2568------(OCR) OCR 10KL1. The bentonite modification process described in this invention consists of a. Preparation of raw materials consisting of bentonite, bentonite modifier, and water; b. Mixing of raw materials; c. Drying of the mixture, characterized by the bentonite modifier consisting of one or more saccharide molecular compounds, and a mixing step resulting in a pH between 11.0 - 14.0 and a dry weight ratio of bentonite to bentonite modifier between 1:0.4 - 1:2.

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2. The bentonite modification process as claimed in Patent 1, where the dry weight ratio of bentonite to bentonite modifier is between 1:0.4 - 1:1.5 and in the mixing step the mixture has a pH between 11.5 - 13.

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3. The bentonite modification process. As per Requisition 1, bentonite is selectable from one or more of calcium bentonite, sodium bentonite, or calcium bentonite modified to sodium bentonite4.The bentonite modifier process, as per Patent 1, where the bentonite modifier is a saccharide molecular compound in powder, liquid, solution, or slurry form, and can be selected from one or more monosaccharides, disaccharides, oligosaccharides, or polysaccharides; more appropriately, the saccharide molecular compound can be selected from one or more glucose, fructose, sucrose, or gluconate compounds.

5. The bentonite modifier process, as per Patent 1, where the moisture content in the mixture during raw material mixing is at least 20% by weight.

6. The bentonite modifier process, as per Patent 1, where the raw material mixing step takes between 2-60 minutes and the mixing temperature is between 25-75 degrees Celsius. 7.The bentonite improvement process, as stated in Patent 1, involves the addition of a pH adjuster during the raw material preparation or mixing stage. This pH adjuster can be an alkaline, alkaline earth, organic acid, or inorganic acid compound, ideally a combination of one or more sodium hydroxide, calcium hydroxide, calcium oxide, acetic acid, or acetic acid.

8. The bentonite improvement process, as stated in Patent 1, includes a drying step by heating or drying the mixture. This drying occurs at temperatures between 30-150°C, with the optimal temperature being 30-110°C.

9. The bentonite improvement process, as stated in Patent 1, includes a grinding step to produce a fine powder after the drying step. Grinding machines include ball mills, roller mills, or centrifugal mills.10.The bentonite modification process, as per claim 1, involves a mixture modification step after the drying step, and this modification step includes the addition of sodium phosphate.